Paper conveying device for sheets, especially for use in office printing machines



Feb, 25, 1936 A. BREUER v 2,32,166

PAPER CONVEYING DEVICE FOR SHEETS, ESPECIALLY FOR USE IN OFFICE PRINTING MACHINES 'Filed Dec 22, 1933 2 Sheets-Sheet l 5 womtom Feb. 25, 11936. A. EREUER PAPER CONVEYING DEVICE FOR SHEETS, ESPECIALLY FOR USE IN OFFICE PRINTING MACHINES 2 Sheets-Sheet 2 Filed Dec. 22, 1953 Patented Feb. 25, 1936 ranges samurai PAPER CONVEYING DEVHCE F6393 SHEETS,

ESPECIALLY?' FOR USE EN ()FFK'CIE EEITNT- ING MACS Armin Breuer', Berlin, Germany Application December 22, 1933, Serial No. 303,598

Germany December 29, was

2 Claims. (01. 271-43) The object of the invention is a paper-conveying device, especially for-printing machines used in oilices. The device consists of a machine with a reciprocating slide for the sheets inclining according to the reductionin height of the pile of sheets, and in which the moving device for elevating the pile table is controlled correspondingly to the reduction of the pile.

In the hitherto known conveying devices, the moving arrangement for elevating the staple table is controlled by the aid of the shifting slide for the sheets, when the pile reduces in size, but

in this case a special coupling and several rods and levers are necessary.

It is the aim of the invention, to simplify essentially the hitherto-known arrangements of this kind so that the construction is less expensive.

According 'to the invention, the slide for the sheets directly controls the driving mechanism which moves the pile table. For this purpose, a lever arm with a pawl is rigidly connected with the slide. The lever for moving the mechanism which elevates. the pile table, is arranged in such a manner that, when the shifting slide moves upon its axle with the reduction in height of the pile of sheets, the pawl, with the return stroke of the paper slide, engages with the lever which is thus set in motion.

In this way the construction of the above men-' tioned conveying devices is very much simplified, being at the same time cheaper and more reliable, facts of great importance, particularly in printing'machines for ofiice purposes.

A further object of this invention is the correct adjustment of the working height'oi. the

printing machine. For this purpose, a touch=ofi3 device is arranged which is released when the pile of sheets reaches the correct height, whereupon the pressure roll is thereby 'broughtinto working position. v

v A further characteristic object of the, invention consists in the automatic cut-out of the electric motor driving the machine, when the pile table descends automatically with the reduc tion in height of the pile of sheets, in order to lay on a fresh pile of sheets.

Finally, according ,to the invention a controlling device for the stoppage flaps is provided in order to obtain an equal height during the printing process. The stoppage flaps are laid down during each working stroke of the machine so as to allow a free passage of the sheet of paper between the printing rolls.

The object of the invention is shown in the annexed drawings, in which:

Figure 1 is a side view of the machine with the automatic height adjustment, whereby the front piece of the frame is omitted in'order to show the arrangement of the separate axles; Figure 2 is the touch-E device for the correct adjustment of the working table in its initial position; Figure 3 is the touch-off device after the insertion of the pressure roll; Figures 4 and 5 are the device for the automatic cut-out of the driving motor and Figures 6 and 7 are controlling devices for the stoppage flap.

Thetable l on which the sheets are piled up, is fixed upon carrying-bars 2 situated on both sides of the table and connected with one another by a curved cross-bar 3. 'The carrying-bars 2 are arranged to move easily in a vertical direction in guide-bars 5 provided on both sides of the frame 30f the machine. The two guidingbars 2 are provided with teeth l at a part of their front surface, which teeth are geared with the toothed wheels d. These toothed wheels are fixed rigidly upon an axle 9 in the frame of the machine. This axle is also fitted with a fixed toothedwheel I l to which another toothed wheel i2 is geared. The toothed wheel I2 is rigidly connected with a ratchet wheel l3. Toothed wheel l2 and ratchet wheel it turn upon a pivot I4 fixed on one side of the frame of the machine. Independently of the ratchet wheel l3, the anglelever I5 is rotatably arranged on the pivot 14, its locking pawl l6 engaging with the teeth of the ratchet wheel l3..

Furthermore the hub on which the lever I5 is fixed carries a lever i'l, provided in front with a notch 18. Therefore the movement of the lever I"! also moves the leverlS.

The drums 2 I, 22, upon which the printing band 22 runs, rotate on the shafts l9 and 20. A toothed wheel 24 is fixed on the shaft 20. This toothed wheel, by the aid of an intermediate toothed wheel 24b on the ax1e24c drives another toothed wheel 25 of equal size. The toothed arm 21 is articulated. The crank arm 21 engages with a pivot 28 of the swinging lever 29. The

a toand fro-movement to the lever arm 29. Beneath the drum 22 is a counter drum 32, which rotates on an axle.

The sheet of paper slides from the table passing between the drums 22 and 32. The axle 3|, which rigidly connects the two swinging links #29 on both sides of the table I, is supplied with jointed arms 33 which swing independently and which carry a pressure roll 34 at the front end. The bearing 35 of the pressure roll is provided with a ratchet or free wheel arrangement in the usual manner, so that when the pressure roll moves in the direction of the arrow 31 no rotation of the roll takes place; the rotation of the roll being blocked, whilst the sheet under the roll is pushed forwards. On the contrary, by the movement in the direction of the arrow 38, the roii 34 moves upon the uppermost sheet of paper without dispiacing the same.

The arms 33 are fixed on a box 39 which is arranged to'rctate on the shaft 3|. The arms 33 have a projection 40 with a pivot 4| on which a pawl 42 turns and which fall into connection with the notch I8 of the lever l1.

With the reduction in height of the pile of sheets, the pressure roll 34 descends and the.

lever arm 40 is thereby moved correspondingly with the rotation of the box 39.

If the pile of the sheets is sufliciently lowered, the pawl 42 on its return stroke falls into the notch 8 of the lever H. The lever H is thereby rotated in the direction of the arrow 43 whereby the locking pawl l5 engaging with the teeth of the ratchet wheel l3, turns this last ratchet Wheel. The toothed wheels i2, H and 8 rotate and the staple table I is elevated to a'higher level. By this means, the pressure roll 34 is lifted up and, with the next working stroke, the locking pawl 42 slides out of action beneath the notch l8 of the lever II. The angle lever i5 is pivoted in a backwards direction to the position indicated in the drawings after each working stroke with the aid 1 of a spring, not shown. The pawl 42 when en- ..gaging the notch I8 swings slightly upwards, so that the rotation of the angle lever i5 suffices-for a sufficient movement of the table With the rotation of the angle lever is, the loeking pawl 42 slides automatically out of engagement with the notch |8 of the lever A locking pawl 44 engages with the teeth of the ratchet wheel I3, thereby preventing the backwards rotation of the same. p

In Figure 1, only the principle of the movement of the table to a higher level is shown. The device is completed 'by arrangements which are shown in Figures 2 to 6. I

As is tobe seen from Figure 2, the pile table I fixed on the bars 2, is in its lowest position. The usual working procedure depends upon the height of the pile of sheets laid upon the table,

and in order to be no longer dependent upon an approximate eye-measurement, a touch-01f device is provided in connection with the pressure roll 34. The touch-01f deviceconsists of a roll 45 arranged on an angle lever 46 which is pivoted round the axle 41. The lever 46 is fitted with a pin 48 which works together with a pin 49 on the fixed shaft 3|.

Upon the commencement of the action of the device, the pressure roll 34 is lifted up so that the pin 48 rests against the pin 49 of the shaft 3|, whereby the lever arm 46 with its roll 45 is inclined slightly downwards. The lever 33 with the roll 34 then takes up a position nearly horizontal. The pile of sheets is now laid upon the table and at such a height that the pile of sheets almost reaches up to the roll 45. The table is then moved upwards to such a height that the uppermost sheet of paper lifts the roll 45, whereby the lever arm 46 with its pin 48 is detached from the pin 49 of the shaft 3|. The roll 45 and therewith the lever arm 46 now rotates about the pivot 41 and the roll 34 with its lever arm 33 is moved slightly downwards and under the action of its own weight falls upon the paper.

In this manner it is possible to obtain the exact adjustment of the uppermost sheet of paper at the required height for the correct working of the machine. ,r Y

The working of the machine now begins and can be continued till the existing pile of sheets is worked up to a certain'limited height. When this height is reached, the sheet table returns automatically in the usual known manner to its initial position. A

According to the invention, the'automatic cutout of the driving motor A operating the machine is connected with the movement of the table when it returns to its initial position. For this purpose a double armed lever 50, according to Figures 4 and 5, turning upon a pivot 5|, is provided. On its front end the lever 50 carries a pivot 52 for a double armed lever 53. The lever arm 54 of the lever 53 carries a pin 55 which can fall into a groove 56 of the lever arm 50. The front end 51 ofthe double armed lever 53 is beveled at 58, and works together with a pin 59 fixed ,on the up and down movable bars 2. The other arm 60 of the double armed lever 50 aflects the switch The action of the device is as follows:

The pin 59 of the bar 2 pivots the lever part 53 during the movement of the table towards the top, but the double armed lever 50 remains without movement. Only during the downward movement of the pile table (Figure 5), the double armed lever 50 is swung out, because in this case the double armed lever 53 acts as a single lever with the lever 50 by reason of the pin 56. The

iever 60 rotates round the axle 5| and, with its utmost end 60, lifts the switch 6| which then cuts off the electric current of the driving motor.

Finally, the device is further completed by a stoppage flap 52 which serves to obtain an equal height when the sheets are being printed. The

stoppage flap is connected with a lever 63 which articulates on a pivot 65, The lever 53 is influenced by apin on the lever arm 21. As soon as the forward stroke of the sheet begins with the aid of the roll 34, the pin 65 of the crank arm 2'! coincides with the 'iever 63 which in consequence rotates roundthe axle 64 moving the stoppage flap 62. Upon the return stroke of the lever arm 21, the lever 63,. under the action of a spring moves up and thereby pushes back any sheets which may have been carried forward together with the uppermost sheet, so that ail sheets lie equaliy one above the other.

What I clain, is:-

1. Conveying device for sheets in printing machines with printing rolls, an adjustabl table and a driving gear for the table, compr ng means for carrying the uppermost sheet of a pile between the printing rolls, and means for automatically moving the adjustable table to exact working level; the. said means for automatically moving the table comprising a pressure roll sup- QWSQJBB pressure Ioii supporting arm for releasing the pressure roll supporting arm.

2. Conveying device for sheets in printing machines with printing rolls, an adjustable table and a driving gear for the table, comprising means for carrying the uppermost sheet of a pile between the printing rolls, and means for automatically moving the adjustable table to exact working level; the said means for automatically moving, the table comprising a lever with a pawl pivotedon the axle of a slide for the sheets, working tosupporting arm.

gether with the moving arm for the driving gear for the adjustment of the table, and the said means for automatically adjusting the table comprising a pressure feed r011 supporting arm, a touching arm arranged on the pressure roll supporting arm, provided with a pin which rests upon a fixed pin on the axle of the pressure teed roll supporting arm for releasing the pressure roll ARMIN BREUER. 

